Conveyer for logs and the like.



K. A. STZHLNACK E.

CONVEYER FOR LOGS AND THE LIKE. I APPLICATION FILED DEC-5,1916- RENEWED APR. 29,1918.

3 SHEETS-SHEET I.

K. A. STAHLNACKE.

C ONVEYEB FOR LOGS AND THE LIKE. APPLICATION FILED DEC 5. ISIS. RENEWED APR-29,1918- Patented Nov. 12, 1918;

LQBQEQSD 3 SHEETS-SHEET 2.

W m V K. A. STKHLNACKE.

CONVEYER FOR LOGS AND THE LIKE.

APPLICATION FILED DEC. 5. I916- RENEWED APR-29.1918.

1,Q8&,806. Patented Nov. 12,1918,

3 SHEETS-SHEET 3- ARTHUR STAHLNACKE, OF @STERAS, BERG-VIII, SWEDEN.

CONVEYER FOR LOGS AND LIKE.

Specification of Letters Patent.

Patented Nov. 12, 1918.

Application filed December 5, 1916, Serial No. 135,202. Renewed April 29, 1918. Serial No. 231,552.

To all whom it may concern:

Be it known that I, KARL ARTHUR STZirrL- NACKE, a subject of the King of Sweden, and

resident of Osteras, Bergvik, inthe Kingdom of Sweden, have invented certain new and useful Improvements in Conveyers for Logs and the like, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to an improvement in conveyers of that class, which move logs and the like to barking machines or similar working machines. Such conveyers generally consist of endless chains (Ewarts chains or the like), which pass by the working machines and then return to the place, at which they are charged with logs. It often happens, especially in great plants, that the machines do not have suiiicient time to work all the logs, which are fed to the same by the conveyer, but some of the logs will gather in a pile at the end of the conveyer and sometimes entirely stop the running of the same. Even if such a gathering is not permitted, the remaining logs are a trouble, because they must be removed in some way or other and returned to the place where the conveyer is charged with logs. This work generally must be effected manually or by means of horses. The object of this inventlon is to remove the said disadvantage and for that reason the invention consists of an auxiliary conveyer comprising endless chains or the like. One end of the said auxiliary conveyer cooperates with the main conveyer behind the working machines, while the other end of the auxiliary conveyer cooperates with the main conveyer before the working machines, so that the auxiliary conveyer automatically returns unworked logs at the main conveyer to a place before the working machines. Consequently, no stagnation of the transportation can be effected.

In the accompanying drawings a form of the invention is shown adapted to a conveyer, which moves raw logs from the store to barking machines. Figure 1 is a side View of the device and Fig. 2 is a the same. Figs. 3 to 7 inclusive show details. In Fig. 8 a modified form of the invention is shown in a side view and diagram maticallv.

The main conveyer 1 is supported in the usual manner by a system of iron beams and passes around sprocket wheels or disks 2 in the direction indicated by the arrow, Fig. l.

lan View of The logs 3, which are transported to the mam conveyer 1 from the water or from the store by a conveyer 4, are thus moved to the grlppmg devices of the barking machines, not shown. The said devices consist of toothed disks or rollers 5 carried by the short arms of bell crank levers 6, F ig. 3, swinging on shafts 7, which are journaled in the frame of the conveyer and are rotated in any suitable manner. The long arms of the said bell crank levers, extending downward, are pivoted to rods'8, which when moved toward the left, (Fig. 3) serve to swing the rollers 5 upward. The said rollers 5 are rotated continuously by the driving shafts 7 through the medium of sprocket wheels 9 and chains 10. When a log is right above a pair of toothed rollers 5 and the corresponding barking machine, located at the side of the conveyer, is unoccupied, the operator causes the rod 8 to be moved toward the left (Fig. 3),

which in the manner just described causes,

the toothed rollers 5 to engage the log. 0wing to their rotary motion the said rollers 5 then move the log to the barking machine, located at the side of the conveyer.

According to this invention an auxiliary conveyer is provided above the conveyer 1. The said auxiliary conveyer consists of three groups of conveyer chains 11, 12 and 13. The chains 11 cooperate with the conveyer l at a place behind the gripping devices 5, while the chains 13 cooperate with the conveyer 1 at a place before the said devices. The said chains 11 are provided with shelfshaped gripping devices arranged and connected by pairs, each of the said devices consisting of an arm 14 and a stay 15, Figs. 4 and 5, which are connected with one another and with two links of the chain located at suitable distances from one another. Between the groups of chains 11 and 12 a device is provided for transmitting the logs from the chains 11 to the chains 12, the said device consisting of arms 16, which are carried b a shaft 17, on which one pair of the sprocket wheels of the group of chains 12 are mounted. In order that the logs may not be jammed between the arms 16 and the chains 12, while they are transmitted from the chains 11 to the chains 12, which would result in the latter being stopped, the said arms 16 are connected with the shaft 17 vand acted upon in a special manner, as illustrated in Figs. 6 and 7. The inner end of the arm 16 is at 18 pivoted to an arm 19 keyed to the shaft 17. The arm 16 has a projection 20 extending backward z. e. in a direction opposite to the rotary direction of the shaft 17 which projection 20 at 21 is pivoted to the rod 22 of the strap 23 of an eccentric 2 1 located on the shaft 17. The said eccentric 24 is loosely mounted on the shaft 17 and is held in a fixed position by an arm 25 made integral with the hub of the eccentric. To the said arm 25 one end of an iron bar 26, Fig. 1, is fixed by means of screws, the other end of which is fixed to the frame of the conveyer.

When the shaft 17 is rotated, the arms 19 and 16 together with the rod 22 and the strap 23 are also rotated. Owing to the fact that the eccentric 24 is stationary and the strap 23 together with the rod 22 rotates around the same, the rod 22 is reciprocated longitudinally and consequently swings the arm 16 forward and backward around the pin 18. By suitably adjusting the eccentric 24 the arm 16 is swung backward (opposite to the rotary direction) iust when the arm 19 has passed its uppermost position, as shown by dotted lines in Fig. 1, and consequently the log 3 will not be jammed between the arms 16 and the conveyer 12 when transmitted to the latter.

The conveyer 12 is constructed in the same manner as the main conveyer 1. The conveyer 13 on the other hand is provided with special gripping devices, Fig. 1, consisting of bell-crank levers 27, which can swing freely around pins 28 connecting the same with the links of the chains.

The shorter arm of each lever 27 is heavier than the longer arm and consequently swings the leveraround the pin 28 into the position shown at the right'hand part of the chain in Fig. 1 in which position the lever can receive the log from the conveyer 12 and support the same during the downward motion of the said part of the chain. The said position of the lever is determined for instance by the shorter arm bearing against the chain. The right hand parts of the chains are supported by suitable guides 29.

The combined conveyer operates in the following manner. The main conveyer 1 moves the log in the usual manner to the gripping devices 5. Remaining logs, if any, continue toward the left, Fig. 1, and are caught by the shelf-shaped gripping devices 14, 15 of the chains 11, which raise the logs into a position, in which they are caught by the arms 16. The said arms 16 transmit the logs to the chains 12, which then move the same to the chains 13, by which they are delivered to the main conveyer 1.

Motion is transmitted to the different groups of conveyer chains for instance in the following manner; from the source of Lac mod power to the shaft 30 carrying the right hand sprocket wheels of thechains'12 and also a pair of sprocket wheels of the chains 13. Chains 12 rotate the shaft 17. From the said shaft 17 motion is transmitted by sprocket wheels 31 and a chain 32 to a shaft 33, which by means of toothed wheels 34, 35. rotates the shaft 36, carrying the top sprocket wheels 37 of the chains 11. The lower sprocket wheels of the chains 11 are fixed to the same shaft as the left hand sprocket wheels 2 of the chains 1 so that the latter are driven by the chains 11. Chains 1 actuate the conveyer 4-.

The invention is, evidently, not confined to the form described above and shown in the drawings but may be modified in many respects. For instance the auxiliary conveyer may be shorter than shown, so that it returns the logs for instance to the last gripping devices 5. The auxiliary conveyer may be located below the main conveyer, as shown in Fig.8. In this case a conveyer 38 of the same type as the conveyer 13 is located at the left hand end of the main conveyer 1, while a conveyer 39 of the same type as the conveyer 11 with the mechanism 16 to 24 inclusive is located at the right hand end of the conveyer 1. The conveyer 40 corresponds to the conveyer 12. The conveyer 4: may, in this case, deliver the logs to a slanting surface 41, from which they fall down to the conveyer 1.

Having now described my invention, what I claim asnew and desire to secure by Letters Patent is: v

1. In combination, two conveyers associated together so that one carries transportable articles to the other, and transferring mechanism comprising a movable article carrier adapted to move between contiguous parts of the conveyers and including a collapsible engaging portion, and means for maintaining the said portion of the carrier in it operative position while passing through the part of its travel wherein it is carrying an article from one conveyer to the other, the said engaging portion being adapted to collapse after it has'reached the point of delivery'of the article to the lastmentioned conveyer to avoid jamming.

2. In combination, two conveyers associated together so that one carries trans-. portable articles to the other, and transferring mechanism comprising a movable article carrier adapted to move between contiguous parts of the conveyers and including a collapsible engaging portion, and means for maintaining the said portion of the carrier in its operative position while passing through that part of its travel wherein it is carrying an article from one conveyer to the other, the said means being adapted to livery of the articles to the last-mentioned -conveyer to avoid jamming.

3. In combination, an endless conveyer, rotatable carrying members for the said conveyer, a second conveyer associated with the first conveyer to carry transportable articles to the latter, and transferring mechanism comprising co-acting engaging members pivotally connected with one of the carrying members of the first-named conveyer at axially spaced points, and means for moving the said engaging members into outwardly projecting operative position each time they move past the second conveyer and toward the first, the said means being adapted to collapse the said engaging members into inoperative position after they have reached a point where the transportable article carried thereby has become deposited upon the first conveyer.

4. In combination, an endless conveyer,-

sisting of an eccentric mounted loosely on the said rotatable carrying member and secured against rotation therewith, and a sheave operatively associated with the eccentric and connected to the engaging member so as to oscillate the latter during rotation of the said carrying member, both eccentrics being disposed so that the engaging members will move into outwardly projecting operative position each time they move past the second conveyer and toward the first and to collapse them into inoperative position after they have reached a point where the transportable article carried thereby has become deposited upon the first conveyer.

5. In combination, a main conveyer belt adapted to move logs and similar articles transversely in a given direction past intermediate discharge points, means provided at the discharge points for removing logs from the said main conveyer, and means for moving the logs which are carried past the discharge points transversely and depositing them back to the feed end of the main conveyer, said means comprising an auxiliary conveyer belt, one of the said conveyers being disposed in superimposed relation to the other, a vertically disposed conveyer belt provided at one end of the main conveyer belt for removing the logs therefrom and transferring the same to the auxiliary conveyer belt, and a third conveyer belt disposed at the opposite end of the auxiliary conveyer for depositing the logs on the main conveyer belt adjacent to the Ifeeding end thereof. In witness whereof, I have hereunto signed my name.

KARL ARTHUR S'IAHLNACKE. 

